CVE-2026-87993Network attack vector

Vault secret disclosure via incomplete error redaction

Published Sep 10, 2026 · Updated Sep 10, 2026

Information disclosure in HashiCorp consul-template 0.27.2 through 0.42.1 allows remote authenticated users to read Vault secrets. The error-path redactor does not correctly handle every Vault secret response shape, leaving certain field values verbatim in template errors and logs. Exposure requires a failing template that processes non-KV-v1 Vault data; Nomad users with job-read permissions can obtain leaked values from task events.

CVSS severity7.7
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in HashiCorp consul-template 0.27.2 through 0.42.1 allows remote authenticated users to read Vault secrets. The error-path redactor does not correctly handle every Vault secret response shape, leaving certain field values verbatim in template errors and logs. Exposure requires a failing template that processes non-KV-v1 Vault data; Nomad users with job-read permissions can obtain leaked values from task events.

The record

CVE
CVE-2026-87993
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-532, CAPEC-215, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.7HashiCorpCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File
CAPEC-215Fuzzing for Application Mapping
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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